CN109628796A - A kind of high elastic and strength titanium alloy and its preparation method and application - Google Patents
A kind of high elastic and strength titanium alloy and its preparation method and application Download PDFInfo
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- CN109628796A CN109628796A CN201910052317.2A CN201910052317A CN109628796A CN 109628796 A CN109628796 A CN 109628796A CN 201910052317 A CN201910052317 A CN 201910052317A CN 109628796 A CN109628796 A CN 109628796A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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Abstract
The invention discloses a kind of high elastic and strength titanium alloys, the O of Nb, 0.1~0.5wt% including 6~18wt% and the Ti of surplus, and the flat fare electron concentration e/a of the titanium alloy is 4.08~4.12,Value is 2.41~2.44,Value is 2.80~2.83, and elasticity modulus is 60~80GPa, tensile strength 850MPa or more, and the tissue of the titanium alloy is mainly alpha+beta two-phase.The invention also discloses a kind of preparation method and applications of above-mentioned high elastic and strength titanium alloy.High resiliency high-strength titanium alloy of the invention has excellent mechanical property, while its melting difficulty is lower, has important theory significance and engineering value.
Description
Technical field
The present invention relates to advanced titanium alloys field, in particular to the oxygen-containing titanium alloy of a kind of high elastic and strength and its preparation
Methods and applications.
Background technique
As important structural and functional properties combined material, metal material or alloy with high elastic and strength are navigating
The works such as sky, space flight, naval vessel, auto industry, bio-medical, precision instrument and daily necessities field has extensive and important need
It asks.Titanium alloy because have low-density, Gao Biqiang, it is corrosion-resistant, without characteristics such as magnetic, high bio-compatibles, in Aeronautics and Astronautics, chemical industry, warship
The industrial circles such as ship, medical treatment and daily necessities are used widely.But traditional alpha+beta and near β titanium alloy is although with higher
Intensity, however due to higher elasticity modulus (90GPa~120GPa), that is, low elastic property makes its application receive limit
System.For this purpose, high elastic and strength titanium alloy is becoming the study frontier and hot spot of advanced material, and current international titanium alloy
The important goal that advanced country competitively develops.
Currently, the research and development of high elastic and strength titanium alloy mainly pass through alloying and working hardening, i.e., alloy keep compared with
On the basis of low elastic modulus, high resiliency titanium alloy is obtained and improving its yield strength, and (predominantly metastable/close β titanium is closed
Gold).Ti-12Mo-6Zr-2Fe, Ti-23Nb-0.7Ta-2Zr-1.2O (Gum metal), Ti-24Nb-4Zr- are developed
The metastable β Titanium-alloys such as 7.9Sn, Ti-29Nb-13Ta-4.6Zr, and or be gradually applied in bio-medical field.This
Most of a little alloys regard oxygen element as harmful impurity element, and control its content.Only Gum metal actively adds
Add more content oxygen element, but the alloy needs to be prepared using powder metallurgy process, and containing compared with Multiple components, is prepared into
Originally it greatly increases.
The current design in relation to high elastic and strength titanium alloy, in order to make its elasticity modulus reach requirement, (60GPa is left
It is right), most of flat fare electron concentration e/a values for controlling its alloy are near 4.24.However, such design alloy contain it is more
Beta stable element (Ta, Nb etc.) and/or neutral element (Zr, Hf, Sn etc.) so that such alloy all includes complicated alloy group
At phenomena such as being readily incorporated impurity during the preparation process, cause element segregation, being had an impact to alloy property, in addition in alloy
Containing more high-melting-point ingredient, to improve preparation cost.In addition there is research by the way that titanium alloy is cold worked, closed to control
The texture of gold obtains preferable mechanical property in turn, but the alloy property that this processing method obtains has significantly respectively to different
Property.
Therefore need to research and develop the high resiliency high-strength titanium alloy of novel low-cost, to solve the above problems.
Summary of the invention
In order to solve deficiency existing for above-mentioned prior art, the present invention provides a kind of high elastic and strength titanium alloy,
It including Ti, Nb and O element, is designed by alloying element component, reduces titanium alloy raw material type, reducing the same of manufacturing cost
When be still able to satisfy the requirement of elasticity modulus, e/a is within the scope of about 4.08-4.12 for flat fare electron concentration,With(two
Horizontal line at the top of person represents average meaning) numerical value be located in the range of 2.41~2.44 and 2.80~2.83.Wherein,
The present invention uses TiO2Powder addition O can make Ti-Nb alloy generate significant solid solution strengthening effect, so that not increasing substantially
Intensity is improved while modulus.In addition, the present invention also added low-melting-point metal Fe, Sn and neutral element Zr to regulate and control β and stablize
Property, and play invigoration effect.The final present invention makes its beta stability by rationally designing TiNb (Zr, Sn) (Fe) O alloy compositions
It is close with Ti-14Nb (wt.%), and stable alpha+beta two-phase structure is obtained by certain thermo-mechanical processi means.Final alloy
Elasticity modulus reach 60~80GPa, tensile strength reaches 850MPa or more.
According to an aspect of the present invention, the present invention provides a kind of high elastic and strength titanium alloy, including 6~18wt%'s
The Ti of Nb, the O of 0.1~0.5wt% and surplus, the flat fare electron concentration e/a of the titanium alloy are 4.08~4.12,Value
It is 2.41~2.44,Value is 2.80~2.83, and elasticity modulus is 60~80GPa, tensile strength 850Mpa or more, the titanium
The tissue of alloy is mainly alpha+beta two-phase.
In some embodiments, the titanium alloy may include the O of Nb, 0.1~0.3wt% including 10~18wt%
With the Ti of surplus.
In some embodiments, the titanium alloy can also include the Fe of 0.5~3wt%.
In some embodiments, the titanium alloy can also including the Fe of 0.5~3wt%, the Zr of 2~6wt%, 2~
The Sn of 5wt%.
According to another aspect of the present invention, the present invention also provides a kind of preparation method of above-mentioned titanium alloy, including it is as follows
Step:
A. according to target component ratio, by each metallic element ingot casting or alloy cast ingot and TiO of the titanium alloy2Powder, benefit
With vacuum non-consumable arc furnace melting technique, titan alloy casting ingot is prepared；
B. by the titan alloy casting ingot prepared in step a at 900~1100 DEG C Homogenization Treatments about 2h, then 600~
Hot forging processing is carried out at 750 DEG C, obtains titanium alloy plate；
C. by titanium alloy obtained in step b in 500-700 DEG C of progress alpha+beta two-phase section thermal deformation, deflection is 75~
90%；
In step a, before using vacuum non-consumable arc furnace melting technique, synthesis material is cleaned by ultrasonic, acid
Step is washed, the surface impurity of raw material is removed.
In some embodiments, further includes: the titanium alloy after thermal deformation is carried out at 600~800 DEG C annealing 10~
120min, argon atmosphere protection, carries out water cooling or air-cooled.
In some embodiments, further includes: by the titanium alloy plate after annealing 300~400 DEG C of progress timeliness 30~
60min, and carry out water cooling or air-cooled.
After heat treatment, the final tissue of alloy is mainly alpha+beta two-phase to titanium alloy of the invention.
According to another aspect of the present invention, the present invention also provides a kind of application of above-mentioned high resiliency high-strength titanium alloy,
It can be used for preparing bio-medical body implant, golf club, high-performance spring, fastener and high resiliency sub-assembly etc..
In some embodiments, the bio-medical body implant may include artificial knee joint, femoral joint, femoral stem,
Spinal joints, marrow bone, screw, tooth root etc..
Beneficial effects of the present invention:
1) titanium alloy of the invention only includes tri- kinds of elements of Ti, Nb and O, by three kinds of elemental constituents are designed as 6~
The Ti of the Nb of 18wt%, the O of 0.1~0.5wt% and surplus, so that making its elasticity modulus (60 while reducing manufacturing cost
~80GPa) and tensile strength (850Mpa or more) reach requirement, flat fare electron concentration e/a is in about 4.08-4.12 model
In enclosing,WithThe numerical value of (horizontal line at the top of the two represents average meaning) is located at 2.41~2.44 and 2.80~
In the range of 2.83.
2) low mould high-strength TiNb (Zr, Sn) (Fe) O alloy of the invention is gone forward side by side using vacuum non-consumable arc furnace melting
The processing such as row homogenization, solid solution, forging, rolling, annealing obtain sheet alloy.It is tested by room temperature tensile, the performance of alloy are as follows:
Elasticity modulus 60-80GPa, tensile strength are 850MPa or more.By different alloy compositions and heat treatment mode, can deploy
The microstructure of alloy is mainly alpha+beta phase, and then controls its mechanical property.
3) present invention uses the simple composition of alloy of ingredient, reduces the problem of being easily introduced impurity during the preparation process, together
Shi Caiyong low-melting-point metal reduces melting difficulty and thus reduces preparation cost, has important theory significance and engineering valence
Value.
Detailed description of the invention
Fig. 1 is the XRD spectrum of titanium alloy of the invention.
Fig. 2 is the stress strain curve of titanium alloy of the invention.
Fig. 3 is the metallographic microscope of annealed state Ti-8Nb-2Fe-0.28O alloy of the invention.
Specific embodiment
Following instance is not intended to limit the scope of the invention for illustrating the present invention.
Embodiment 1: preparation rolling state Ti-14.6Nb-0.16O alloy
(1) prepare high-purity Ti ingot, Nb ingot, TiO2Powder raw material, and according to the above alloying component proportions, by raw material
It is cleaned by ultrasonic, pickling, removes surface impurity.Raw material is put into vacuum non-consumable arc furnace and carries out melting, is melted
It is smelt TiNbO ingot casting.
(2) then above-mentioned TiNbO ingot casting is carried out hot forging processing at 600 DEG C, closed at 1100 DEG C of Homogenization Treatments 2h
Golden plate material.
(3) by above-mentioned sheet alloy in 600 DEG C of progress hot rolling treatments, amount of rolling 80%.
The Ti-14.6Nb-0.16O alloy prepared in this implementationIt is 2.44,For 2.81, e/a 4.09.From figure
It can be seen that in 1 XRD spectrum, the alloy of acquisition is mainly α and β phase.By extension test (as shown in Figure 2), the titanium alloy
Elasticity modulus is 80GPa, tensile strength 850MPa, elongation percentage 16%.
Embodiment 2: aging state Ti-14.6Nb-0.16O alloy is prepared
(1) prepare high-purity Ti ingot, Nb ingot, TiO2Powder raw material, and according to the above alloying component proportions, by raw material
It is cleaned by ultrasonic, pickling, removes surface impurity.Raw material is put into vacuum non-consumable arc furnace and carries out melting, is melted
It is smelt TiNbO ingot casting.
(2) then above-mentioned ingot casting is carried out hot forging processing at 600 DEG C, obtain alloy sheets at 1100 DEG C of Homogenization Treatments 2h
Material；
(3) by above-mentioned sheet alloy in 600 DEG C of progress hot rolling treatments, amount of rolling 80%；
(4) plate after the rolling is subjected to annealing 60min at 600 DEG C, and carried out air-cooled；
(5) it by above-mentioned alloy in 350 DEG C of progress timeliness 60min, and carries out air-cooled.
The Ti-14.6Nb-0.16O alloy prepared in this implementationIt is 2.44,For 2.81, e/a 4.09.The conjunction
Gold is mainly α and β phase, and contains a small amount of ω phase (see figure 1).The crystallite dimension of the alloy is very thin, about 1 μm of left side
It is right.By extension test (as shown in Figure 2), the elasticity modulus of the titanium alloy is 80GPa, tensile strength 880MPa, elongation percentage
It is 28%.
Embodiment 3: preparation annealed state Ti-8Nb-2Fe-0.28O alloy
(1) prepare high-purity Ti ingot, Nb ingot, Fe ingot, TiO2Powder raw material, and according to the above alloying component proportions, it will
Raw material are cleaned by ultrasonic, pickling, remove surface impurity.Raw material is put into vacuum non-consumable arc furnace and is melted
Refining, is smelted into ingot casting.
(2) then above-mentioned ingot casting is carried out hot forging processing at 600 DEG C, obtain alloy sheets at 1100 DEG C of Homogenization Treatments 2h
Material.
(3) by above-mentioned sheet alloy in 600 DEG C of progress hot rolling treatments, amount of rolling 80%.
(4) plate after the rolling is subjected to annealing 30min at 700 DEG C, and carries out water cooling.
The Ti-8Nb-2Fe-0.28O alloy prepared in this implementationIt is 2.41,For 2.79, e/a 4.12.It should
Alloy is mainly α and β phase, and a small amount of ω phase (see figure 1).As shown in figure 3, Dispersed precipitate is many tiny in the alloy
About 1 μm or so of α phase.By extension test (as shown in Figure 2), the elasticity modulus of the alloy is 74GPa, and tensile strength is
1029MPa, elongation percentage 21%.
Embodiment 4: preparation annealed state Ti-14.6Nb-5Zr-4Sn-1Fe-0.33O alloy
(1) prepare high-purity Ti ingot, Nb ingot, Zr ingot, Sn ingot, Fe ingot, TiO2 powder raw material, and according to the above alloying component ratio
Example proportion, raw material is cleaned by ultrasonic, pickling, and surface impurity is removed.Raw material is put into vacuum non-consumable electric arc
Melting is carried out in furnace, is smelted into ingot casting.
(2) then above-mentioned ingot casting is carried out hot forging processing at 600 DEG C, obtain alloy sheets at 1100 DEG C of Homogenization Treatments 2h
Material.
(3) by above-mentioned sheet alloy in 600 DEG C of progress hot rolling treatments, amount of rolling 80%.
(4) plate after the rolling is subjected to annealing 30min at 620 DEG C, and carries out water cooling.
The Ti-14.6Nb-5Zr-4Sn-1Fe-0.33O alloy prepared in this implementationIt is 2.43,It is 2.80,
E/a is 4.12.The alloy is mainly α and β phase, and a small amount of ω phase (see figure 1).By extension test (as shown in Figure 2),
The elasticity modulus of the alloy is 61GPa, tensile strength 972MPa, elongation percentage 18%.
It should be understood that the present invention is not limited to the limitation of above-described embodiment, it is other any without departing from spirit of the invention
Essence and made changes, modifications, substitutions, combinations, simplifications under principle, should be equivalent substitute mode, are included in this hair
Within bright protection scope.
Claims (10)
1. a kind of high elastic and strength titanium alloy, which is characterized in that the O of Nb, 0.1~0.5wt% including 6~18wt% and remaining
The Ti of amount, the flat fare electron concentration e/a of the titanium alloy are 4.08~4.12,Value is 2.41~2.44,Value is
2.80~2.83, elasticity modulus is 60~80GPa, tensile strength 850MPa or more, and the tissue of the titanium alloy is mainly alpha+beta two
Phase.
2. titanium alloy according to claim 1, which is characterized in that the O of Nb, 0.1~0.3wt% including 10~18wt%
With the Ti of surplus.
3. titanium alloy according to claim 1, which is characterized in that further include the Fe of 0.5~3wt%.
4. titanium alloy according to claim 1, which is characterized in that further include the Fe of 0.5~3wt%, 2~6wt% Zr,
The Sn of 2~5wt%.
5. a kind of preparation method of titanium alloy described in one of -4 according to claim 1, which comprises the steps of:
A. according to target component ratio, by the ingot casting of each metallic element of the titanium alloy or intermediate alloy ingot and TiO2Powder utilizes
Vacuum non-consumable arc furnace melting technique, prepares titan alloy casting ingot；
B. by the titan alloy casting ingot prepared in step a at 900~1100 DEG C Homogenization Treatments about 2h, then at 600~750 DEG C
Under carry out hot forging processing, obtain titanium alloy forging blank；
C. by titanium alloy obtained in step b in 500-700 DEG C of progress alpha+beta two-phase section thermal deformation, deflection is 75~90%.
6. according to the method described in claim 5, it is characterized by further comprising: by the titanium alloy after thermal deformation 600~800
10~120min of annealing DEG C is carried out, argon atmosphere protection carries out water cooling or air-cooled.
7. according to the method described in claim 6, it is characterized by further comprising: by the titanium alloy plate after annealing 300~
400 DEG C of progress 30~60min of timeliness, and carry out water cooling or air-cooled.
8. according to method described in claim 5-7, which is characterized in that the final tissue of the titanium alloy is mainly alpha+beta two-phase.
9. a kind of application of titanium alloy described in one of -8 according to claim 1, which is characterized in that it is used to prepare bio-medical
Body implant, golf club, high-performance spring, fastener and high resiliency sub-assembly etc..
10. application according to claim 9, which is characterized in that the bio-medical body implant includes that artificial knee closes
Section, femoral joint, femoral stem, spinal joints, marrow bone, screw, tooth root etc..
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112063887A (en) * | 2020-09-17 | 2020-12-11 | 北京航空航天大学 | Multifunctional titanium alloy, preparation method and application thereof |
| TWI755263B (en) * | 2021-01-27 | 2022-02-11 | 國立清華大學 | High strength and low modulus alloy and use thereof |
| CN115044803A (en) * | 2022-07-11 | 2022-09-13 | 成都大学 | Titanium alloy with three-phase structure and preparation method thereof |
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| US9828655B2 (en) * | 2015-09-04 | 2017-11-28 | Kind Fahd University of Petroleum and Minerals | Titanium alloys for biomedical applications and fabrication methods thereof |
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| TWI755263B (en) * | 2021-01-27 | 2022-02-11 | 國立清華大學 | High strength and low modulus alloy and use thereof |
| CN115044803A (en) * | 2022-07-11 | 2022-09-13 | 成都大学 | Titanium alloy with three-phase structure and preparation method thereof |
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